Friday the 13th: The Final Chapter (1984)

Actually Is: The fourth film in a series of twelve (and counting). Hmmm.

Scary Movie (2000)

Sounds Like: We could be in store for a genuinely frightening horror film.

Actually Is: A genuinely unfunny spoof. Of a film that was kind of a spoof in the first place.

There Be Dragons (2011)

Sounds Like: A swords-and-sorcery-packed quest movie in which a diminutive hero must journey to a dangerous land in order to save the kingdom.

Actually Is: A historical epic set against the backdrop of the Spanish Civil War, a conflict notorious for its lack of dragons.

Halloween 3: Season Of The Witch (1982)

Sounds Like: The next instalment in the Michael Myers story, with the white-faced ghoul going on another rampage.

Actually Is: An entirely unrelated tale of horror, with Myers nowhere to be seen. Hmm.

Whip It (2009)

Sounds Like: A sadomasochistic saga in which an innocent young girl discovers the illicit pleasures of BDSM when she starts up an affair with a wealthy businessman. Actually Is: A perky high-school sports movie about a roller-derby team.

Tyrannosaur (2011)

Sounds Like: A Jurassic Park spin-off in which we follow the adventures of that ferocious T-Rex as she prowls Isla Nublr with no humans to get in her way.

Actually Is: A hard-hitting tale of domestic abuse, starring a very angry Peter Mullan but no dinosaurs.

The Deer Hunter (1978)

Sounds Like: The account of a backwoods hunter’s ongoing duel with an elusive buck. Who will emerge on top?

Actually Is: A stark account of the horrors of the Vietnam war. Where are all the deer?